public static function add_manage_perks_action($actions, $plugin_file)
 {
     if (!GWPerks::is_last_modified_plugin_perk()) {
         return $actions;
     }
     // if we're coming from Manage Perk's page...
     if (self::is_request_from_gravity_perks()) {
         $actions['manage_perks'] = '<a href="' . GW_MANAGE_PERKS_URL . '">' . __('Back to Manage Perks page', 'gravityperks') . '</a>';
         unset($actions['plugins_page']);
     } else {
         $actions['manage_perks'] = '<a href="' . GW_MANAGE_PERKS_URL . '">' . __('Manage Perks', 'gravityperks') . '</a>';
     }
     if (isset($actions['activate_plugin'])) {
         $actions['activate_plugin'] = str_replace(__('Activate Plugin'), __('Activate Perk', 'gravityperks'), $actions['activate_plugin']);
     }
     return $actions;
 }